Analysis of information sources in references of the Wikipedia article "Khaydhar ibn Kawus al-Afshin" in English language version.
Among the prisoners captured by Bogha al-Kabir in 854, John Catholicos and Tovma Arcruni mention three Albanian princes: Atrnerseh, lord of Khachen, Sahl ibn-Sunbat, lord of Shake, Esay Abu Musa, lord of Ktish in Artsakh.
During the reign of the caliph Mahdi (158-69/775-85) the Afshin of Oshrusana is mentioned among several Iranian and Turkish rulers of Transoxania and the Central Asian steppes who submitted nominally to him (Yaqubi, II, p. 479)
Among the prisoners captured by Bogha al-Kabir in 854, John Catholicos and Tovma Arcruni mention three Albanian princes: Atrnerseh, lord of Khachen, Sahl ibn-Sunbat, lord of Shake, Esay Abu Musa, lord of Ktish in Artsakh.